First of all press [~] on the keyboard for cheat console.
mp_limitteams 0 - revents team pile-up restriction
mat_wireframe 1 - Wireframe view of world
mp_autoteambalance 0 - Prevents the automatic balance of teams on the next round
cl_cmdrate 1 - Makes ping appear low, but doesn't affect actual ping
cl_crosshairscale 5000 - Makes your crosshair really small (default unknown)
cl_sidespeed 3500 - Allows you to move at the set diagonal speed
noclip - Fly through the map
notarget - Fly through the mapBots can't detect you
Cl_hidefrags 0 - To see other peoples records of kills and deaths.